Khurasan Miniatures have just released a complete range of 6mm alien slave soldiers, the Core Systems Ghulams. Available now:
https://khurasanminiatures.tripod.com/6mmscifi.htmlThese are tall, cunning, highly disciplined warriors who hire themselves out as mercenaries as they travel the galaxy in their massive starship home fleet. The range includes a tank, laser tank, missile tank, scout car, gunship, and infantry.